Hello and welcome to Health Care Magic,
The injury that your grandson sustained is not direct hit to the head.
However, injury to the face can also be dangerius and cause indirect concussion
or other injuries to delicate structures of the cranium.
I suggest you not waste any more time and rush to the local hospital.
A CT head is urgently required to rule out any head injury
Head ache and vomiting
can be due to sub arachanoid bleed.
I hope my answer is of help to you.
Thanks and take care
Dr Shailja P Wahal